> On Wednesday 18 April 2001 12:30, you wrote: > > > A message that gets received or transmitted will involve a form of > > > acknowledgement to be sent/received, and therefore a writer thread would > > > also need to read and v.v. > > > > And do you have to retransmit a packet if you don't get the ACK for it > > within a set time? > Yes, this may well be a possiblity. Any thoughts on the other issues I > raised? Well, there's the question of whether you need to detect duplicate messages from the device, if your ACK isn't received by the device, and what happens if the device receives a message from you twice because the ACK from the device didn't make it to you. Do packets from the device include an ID that you put in your ACKs? Do packets to the device include an ID that the device puts in its ACKS to you? Or are communications synchronous, where the device sends you a single packet and must receive the ACK before sending the next packet? What if you send a packet at the same time the device does? You are each expecting an ACK but instead receive a data packet. Can you distinguish that case? Does the device handle it correctly?
